Oakland's college-bound masses will be happy to hear a comparison shopping site has decided Pittsburgh and Boston had the lowest total cost for a list of 30 "dorm essentials," such as laptop computers, printers, TVs, microwave ovens and MP3 players. The survey, produced by PriceRunner, a service owned by ValueClick Inc., found New York and Seattle to be the most expensive. The average cost for all the items was $2,751.79.